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import std/strutils
import std/tables
import chagashi/charset
import chagashi/decoder
import io/dynstream
import io/promise
import loader/headers
import loader/request
import monoucha/javascript
import monoucha/jserror
import monoucha/quickjs
import monoucha/tojs
import types/blob
import types/opt
import types/referrer
import types/url
import utils/mimeguess
import utils/twtstr
type
ResponseType* = enum
rtDefault = "default"
rtBasic = "basic"
rtCors = "cors"
rtError = "error"
rtOpaque = "opaque"
rtOpaquedirect = "opaqueredirect"
ResponseFlag* = enum
rfAborted
Response* = ref object
responseType* {.jsget: "type".}: ResponseType
res*: int
body*: SocketStream
bodyUsed* {.jsget.}: bool
status* {.jsget.}: uint16
headers* {.jsget.}: Headers
url*: URL #TODO should be urllist?
unregisterFun*: proc()
resumeFun*: proc(outputId: int)
internalMessage*: string # should NOT be exposed to JS!
outputId*: int
onRead*: proc(response: Response) {.nimcall.}
onFinish*: proc(response: Response; success: bool) {.nimcall.}
opaque*: RootRef
flags*: set[ResponseFlag]
FetchPromise* = Promise[JSResult[Response]]
jsDestructor(Response)
proc newResponse*(res: int; request: Request; stream: SocketStream;
outputId: int; status: uint16): Response =
return Response(
res: res,
url: request.url,
body: stream,
outputId: outputId,
status: status
)
func makeNetworkError*(): Response {.jsstfunc: "Response.error".} =
#TODO use "create" function
return Response(
res: 0,
responseType: rtError,
status: 0,
headers: newHeaders(hgImmutable),
bodyUsed: true
)
func sok(response: Response): bool {.jsfget: "ok".} =
return response.status in 200u16 .. 299u16
func surl*(response: Response): string {.jsfget: "url".} =
if response.responseType == rtError or response.url == nil:
return ""
return $response.url
#TODO: this should be a property of body
proc close*(response: Response) {.jsfunc.} =
response.bodyUsed = true
if response.unregisterFun != nil:
response.unregisterFun()
response.unregisterFun = nil
if response.body != nil:
response.body.sclose()
response.body = nil
func getCharset*(this: Response; fallback: Charset): Charset =
this.headers.table.withValue("Content-Type", p):
let header = p[][0].toLowerAscii()
let cs = header.getContentTypeAttr("charset").getCharset()
if cs != CHARSET_UNKNOWN:
return cs
return fallback
func getContentType*(this: Response; fallback = "application/octet-stream"):
string =
this.headers.table.withValue("Content-Type", p):
return p[][0].untilLower(';').strip()
# also use DefaultGuess for container, so that local mime.types cannot
# override buffer mime.types
return DefaultGuess.guessContentType(this.url.pathname, fallback)
func getContentLength*(this: Response): int64 =
this.headers.table.withValue("Content-Length", p):
for x in p[]:
let u = parseUInt64(x.strip(), allowSign = false)
if u.isSome and u.get <= uint64(int64.high):
return int64(u.get)
return -1
func getReferrerPolicy*(this: Response): Option[ReferrerPolicy] =
this.headers.table.withValue("Referrer-Policy", p):
return strictParseEnum[ReferrerPolicy](p[][0])
proc resume*(response: Response) =
response.resumeFun(response.outputId)
response.resumeFun = nil
type TextOpaque = ref object of RootObj
buf: string
bodyRead: Promise[JSResult[string]]
const BufferSize = 4096
proc onReadText(response: Response) =
let opaque = TextOpaque(response.opaque)
while true:
let olen = opaque.buf.len
try:
opaque.buf.setLen(olen + BufferSize)
let n = response.body.recvData(addr opaque.buf[olen], BufferSize)
opaque.buf.setLen(olen + n)
if n == 0:
break
except ErrorAgain:
opaque.buf.setLen(olen)
break
proc onFinishText(response: Response; success: bool) =
let opaque = TextOpaque(response.opaque)
let bodyRead = opaque.bodyRead
if success:
let charset = response.getCharset(CHARSET_UTF_8)
bodyRead.resolve(JSResult[string].ok(opaque.buf.decodeAll(charset)))
else:
let err = newTypeError("NetworkError when attempting to fetch resource")
bodyRead.resolve(JSResult[string].err(err))
proc text*(response: Response): Promise[JSResult[string]] {.jsfunc.} =
if response.body == nil:
return newResolvedPromise(JSResult[string].ok(""))
if response.bodyUsed:
let err = newTypeError("Body has already been consumed")
return newResolvedPromise(JSResult[string].err(err))
let opaque = TextOpaque(bodyRead: Promise[JSResult[string]]())
response.opaque = opaque
response.onRead = onReadText
response.onFinish = onFinishText
response.bodyUsed = true
response.resume()
return opaque.bodyRead
type BlobOpaque = ref object of RootObj
p: pointer
len: int
size: int
bodyRead: Promise[JSResult[Blob]]
contentType: string
proc onReadBlob(response: Response) =
let opaque = BlobOpaque(response.opaque)
while true:
try:
if opaque.len + BufferSize > opaque.size:
opaque.size *= 2
opaque.p = realloc(opaque.p, opaque.size)
let p = cast[ptr UncheckedArray[uint8]](opaque.p)
let diff = opaque.size - opaque.len
let n = response.body.recvData(addr p[opaque.len], diff)
opaque.len += n
if n == 0:
break
except ErrorAgain:
break
proc onFinishBlob(response: Response; success: bool) =
let opaque = BlobOpaque(response.opaque)
let bodyRead = opaque.bodyRead
if success:
let p = realloc(opaque.p, opaque.len)
opaque.p = nil
let blob = if p == nil:
newBlob(nil, 0, opaque.contentType, nil)
else:
newBlob(p, opaque.len, opaque.contentType, deallocBlob)
bodyRead.resolve(JSResult[Blob].ok(blob))
else:
if opaque.p != nil:
dealloc(opaque.p)
opaque.p = nil
let res = newTypeError("Error reading response")
bodyRead.resolve(JSResult[Blob].err(res))
proc blob*(response: Response): Promise[JSResult[Blob]] {.jsfunc.} =
if response.bodyUsed:
let err = JSResult[Blob].err(newTypeError("Body has already been consumed"))
return newResolvedPromise(err)
let opaque = BlobOpaque(
bodyRead: Promise[JSResult[Blob]](),
contentType: response.getContentType(),
p: alloc(BufferSize),
size: BufferSize
)
response.opaque = opaque
response.onRead = onReadBlob
response.onFinish = onFinishBlob
response.bodyUsed = true
response.resume()
return opaque.bodyRead
proc json(ctx: JSContext; this: Response): Promise[JSValue] {.jsfunc.} =
return this.text().then(proc(s: JSResult[string]): JSValue =
if s.isNone:
return ctx.toJS(s.error)
return JS_ParseJSON(ctx, cstring(s.get), csize_t(s.get.len),
cstring"<input>")
)
proc addResponseModule*(ctx: JSContext) =
ctx.registerType(Response)
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